Cement cyclone preheater with anti-sticking duct

Abstract

The utility model discloses a cement cyclone preheater of anti -sticking pipeline, including preheater main part, blanking tube, first cone cylinder, guide pipe and inclined plate, the blanking tube is fixedly connected in the C5 section below preheater main part, the first cone cylinder concentricity is placed in the inside of blanking tube and is close to the interface of C5 section and blanking tube, the first cone cylinder is fixedly connected with the inner wall of blanking tube through even distribution's several inclined plates, the first cone cylinder lower end is fixedly connected with the guide pipe of the concentricity setting of blanking tube, the utility model has the advantages of: through inside guide component, has forcedly changed the flow pattern of material, makes material with concentrated material column form " walk middle part", has avoided material and pipe wall direct contact fundamentally, has eliminated the prerequisite that the adhesion and skinning produced, has realized the initiative prevention from the source, and the effect of preventing is remarkable and stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cyclone preheater technical field, especially relates to a cement cyclone preheater of anti -sticking pipeline. BACKGROUND

[0002] Cement cyclone preheater is the core equipment indispensable on modern dry cement production line, it utilizes the high temperature exhaust gas of rotary kiln, passes through the preheating tower of multistage cyclone cylinder, carries out sufficient preheating and partial decomposition to raw meal before entering rotary kiln, thereby significantly improves production efficiency, reduces energy consumption, but, the existing cement cyclone preheating usually is five levels, and because temperature is high, the things such as alkali, chloride ion in material, especially easy to form skin, cake on the pipe wall, since the downcomer is straight pipe, when material comes down, a part sticks to the pipe wall and walks, and the speed is slow, so it is easy to stick on it, with time, the skin formed is thicker and thicker, and finally is completely blocked. CONTENT

[0003] The utility model wants to solve the technical problem to provide a cement cyclone preheater of anti -sticking pipeline.

[0004] In order to solve the above technical problem, the technical scheme of the utility model is:

[0005] A cement cyclone preheater of anti -sticking pipeline, including preheater main part, downcomer, first cone cylinder, guide pipe and inclined plate, the downcomer is fixedly connected below C5 section of preheater main part, the first cone cylinder is concentrically arranged in the downcomer and is close to the interface of C5 section and the downcomer, the first cone cylinder is fixedly connected with the inner wall of the downcomer through the evenly distributed inclined plate, the guide pipe concentrically arranged with the downcomer is fixedly connected to the lower end of the first cone cylinder.

[0006] Further, the first cone cylinder is fixedly connected with the second cone cylinder concentrically arranged with the downcomer at the upper end and the welding seam between the downcomer and C5 section.

[0007] Further, the cross section of the first cone cylinder wall is 40 ° ~ 60 ° with the horizontal plane.

[0008] Further, the cross section of the first cone cylinder wall is 50 ° with the horizontal plane.

[0009] Further, the angle between the cross section of the second cone cylinder wall and the horizontal plane is the same as the first cone cylinder.

[0010] Further, the inclined plate is evenly provided with three pieces, and the plate surface is arranged in the direction perpendicular to the horizontal plane.

[0011] Further, the first cone cylinder, guide pipe, inclined plate and second cone cylinder are made of heat-resistant and wear-resistant cast steel.

[0012] The utility model discloses a beneficial effect:

[0013] Through internal material guide assembly, the flow pattern of material is forced to change, and the material "walks in the middle" in the form of concentrated column, which fundamentally avoids the direct contact between the material and the pipe wall, eliminates the prerequisite for the generation of sticking and skinning, realizes the active prevention from the source, and the anti-blocking effect is remarkable and stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structural schematic diagram of the utility model;

[0015] Fig. 2 It is the enlarged view of figure A.

[0016] In the drawing,

[0017] 1-preheater main body, 2-feeding pipe, 3-first cone cylinder, 4-conduit, 5-inclined plate, 6-second cone cylinder;

[0018] 14-C4 section, 15-C5 section. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model will be further explained in combination with the drawings. It needs to be explained here that the explanation of these embodiments is used to help understanding the utility model, but does not constitute the limitation to the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] The utility model provides a cement cyclone preheater of anti-sticking pipeline, and it aims at optimizing the flow track of material by setting a set of material guide assembly inside the feeding pipe 2, thereby fundamentally preventing material sticking and blocking.

[0021] Referring to Figs. 1-2 As shown in the figure, a cement cyclone preheater of anti-sticking pipeline includes preheater main body 1, feeding pipe 2, first cone cylinder 3, conduit 4 and inclined plate 5;Feeding pipe 2 is fixedly connected below C5 section 15 of preheater main body 1;First cone cylinder 3 is concentrically arranged inside feeding pipe 2 and is close to the interface between C5 section 15 and feeding pipe 2;First cone cylinder 3 is fixedly connected with the inner wall of feeding pipe 2 through a plurality of inclined plates 5 evenly distributed;The lower end of first cone cylinder 3 is fixedly connected with conduit 4 arranged concentrically with feeding pipe 2.

[0022] It should be noted that the feed pipe 2 is a pipe connected to the bottom of the last stage cyclone of the preheater body 1 (this article takes a five-stage preheater as an example, i.e., C5 section 15). The feed pipe 2 is usually a vertical or nearly vertical cylindrical pipe, with its upper end fixed to the conical outlet of C5 section 15 by welding or other means, and its lower end connected to the tail gas chamber of the decomposition furnace or rotary kiln. The function of the feed pipe 2 is to transport the high-temperature raw material powder (temperature can reach above 800℃) after gas-solid separation in C5 section 15 to the next process. In the prior art, the material is prone to contact and friction with the pipe wall of the feed pipe 2 during the falling process, which is the main cause of adhesion and blockage; the first cone 3 is concentrically set inside the feed pipe 2. Here, "concentrically set" means that the central axis of the first cone 3 coincides or is substantially coincident with the central axis of the feed pipe 2. The installation position of the first cone 3 is close to the interface between C5 section 15 and the feed pipe 2, that is, the upper inlet area of ​​the feed pipe 2. The purpose of this design is to intervene and guide the material in the initial stage as it enters the feed pipe 2. The first cone 3 is constructed as an inverted cone, with the larger opening facing upwards and the smaller opening downwards. Its function is to receive the dispersed material falling from section C5 15 and, through its inclined inner wall, force the material to converge towards the center, preventing it from falling along the inner wall of the feed pipe 2. The inclined plate 5 is a connector used to fix and support the first cone 3 inside the feed pipe 2. Several inclined plates 5 are evenly distributed around the circumference of the first cone 3, with one end fixed to the outer wall of the first cone 3 (e.g., welded) and the other end fixed to the inner wall of the feed pipe 2. This suspended installation method ensures that the first cone 3 can be stably maintained in the center position of the feed pipe 2. The guide tube 4 is a cylindrical pipe, with its upper end fixed to the lower end (i.e., the smaller opening end) of the first cone 3 and concentrically arranged with the feed pipe 2. The diameter of the conduit 4 is smaller than the diameter of the small end of the first cone 3 and significantly smaller than the inner diameter of the feed pipe 2. Its function is to perform secondary convergence and acceleration on the material flow after it has been collected by the first cone 3, forming a more stable and concentrated high-speed central column of material, thereby completely isolating the material flow from the inner wall of the feed pipe 2.

[0023] In a preferred embodiment, a second cone 6 is provided to further optimize the material guiding effect and protect the connection area. The second cone 6 is also concentrically positioned with the feed pipe 2, and its structure is an upright cone, i.e., the larger opening faces downwards and the smaller opening faces upwards. The larger opening of the second cone 6 is fixedly connected to the upper end (i.e., the larger opening end) of the first cone 3, and the diameter of its smaller opening is approximately equal to the diameter of the feed inlet of section C5 15. The position of the second cone 6 is cleverly designed, located precisely at the weld connection between the feed pipe 2 and section C5 15. The second cone 6 serves two purposes: firstly, it forms a smooth transition, guiding the material exiting section C5 15 more smoothly into the first cone 3, avoiding impact and stagnation of material at the step or weld at the feed pipe inlet, reducing the initial risk of adhesion. Secondly, the second cone 6 provides physical protection for the weld area between the feed pipe 2 and section C5 15, preventing direct erosion and wear from high-temperature materials, and extending the service life of this critical component. There is a certain gap, for example, 30cm, between the first cone 3 and the second cone 6 to facilitate the upward flow of hot air.

[0024] The inclination angle of the first cone 3 is a key parameter affecting its material guiding effect. This angle refers to the angle between the generatrix (i.e., the cross-section of the cylinder wall) of the first cone 3 and the horizontal plane. If the angle is too small (e.g., less than 40°), the cone surface is too gentle, and the material's sliding speed on the cone surface is insufficient, which may cause stagnation and accumulation on the cone surface, thus forming new blockage points. If the angle is too large (e.g., greater than 60°), the cone surface is too steep. Although the material slides down quickly, its ability to converge towards the center is weakened, and some high-speed material particles may bypass the cone surface and directly impact the pipe wall below. After actual working condition testing, this utility model preferably sets the angle to the range of 40° to 60°. Within this angle range, the first cone 3 can ensure that the material slides smoothly and without stagnation, and can effectively converge the material to the center. In a particularly preferred embodiment, the angle is set to 50°, at which point the material guiding effect, structural stability, and processing economy are optimally balanced.

[0025] In the embodiment where a second cone 6 is provided, preferably, the angle between the cross-section of the second cone 6 and the horizontal plane is the same as that of the first cone 3. This symmetrical design makes the transition from the second cone 6 to the first cone 3 as smooth as possible, and the flow direction of the material can be changed without disturbance, thereby minimizing the loss of kinetic energy and impact of the material and ensuring the smoothness of the inlet section of the entire material guiding assembly.

[0026] The number and arrangement of the inclined plates 5 need to balance support strength and obstruction of material flow. In a preferred embodiment of this invention, three inclined plates 5 are used. The three inclined plates are evenly arranged at 120° angles along the circumference, which provides a stable and reliable support mechanically. Furthermore, the surface of each inclined plate 5 is arranged perpendicular to the horizontal plane, i.e., radially along the feed pipe 2. This arrangement minimizes the obstruction area of ​​the vertically falling material flow by the inclined plates 5, thus minimizing interference with material flow. Further, to reduce resistance, the edges of the material-facing and material-repelling sides of the inclined plates 5 can be machined into streamlined or tapered shapes.

[0027] Specifically, considering the high temperature (over 800°C), strong wear, and certain chemical corrosion environment inside the preheater feed pipe, all components constituting the material guiding assembly, including the first cone 3, guide tube 4, inclined plate 5, and second cone 6, are made of materials that meet the requirements for strength and durability. Preferably, heat-resistant and wear-resistant cast steel, such as high-chromium cast iron (e.g., Cr20, Cr26) or other heat-resistant alloy steel, is used. This material not only maintains sufficient mechanical strength and creep resistance at high temperatures, but its excellent wear resistance can also resist the long-term erosion of high-speed material particles, ensuring a long service life for the entire material guiding assembly.

[0028] The connecting pipes of sections C4 and C5 in this application are also equipped with the same structure as the feed pipe 2, including a first cone 3, a guide tube 4, an inclined plate 5, and a second cone 6, to ensure anti-sticking in this section. Because the feed pipe remains continuously unobstructed, the pressure and ventilation of the entire preheater system are stabilized, avoiding drastic fluctuations in kiln conditions caused by blockages, thus ensuring the stability of clinker output and quality and improving production efficiency. Eliminating the blockage problem eliminates the need for dangerous manual high-temperature material clearing operations, completely eliminating related safety hazards and greatly reducing the labor intensity of frontline workers. The entire material guiding assembly has a simple structure with no moving parts. Through reasonable structural design and the selection of heat-resistant and wear-resistant materials, it ensures long-term reliable operation under harsh conditions and low maintenance costs. This material guiding assembly can be prefabricated as a modular component and can be quickly installed into existing feed pipes during minor or major system repairs. Modification is convenient and the investment cost is low, but the resulting production and safety benefits are enormous.

[0029] The working principle of this utility model:

[0030] The high-temperature, dispersed raw material powder separated from section C5 15 first enters the smooth inlet transition zone formed by the second cone 6, and then falls evenly onto the inclined inner wall of the first cone 3. Due to the optimized inclination angle (40°~60°) of the first cone 3, the material does not remain on the cone surface but slides rapidly towards the center and converges. At the narrow end of the first cone 3, the converged material flow is further converged and accelerated by the fixed conduit 4, ultimately forming a highly concentrated, high-speed central column of material with a diameter much smaller than the inner diameter of the feed pipe 2. Under the influence of gravity, this central column of material falls rapidly along the central axis of the feed pipe 2, forming a ring-shaped "gas-solid isolation zone" between itself and the inner wall of the feed pipe 2.

[0031] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A cement cyclone preheater for preventing pipe adhesion, characterized in that: The device includes a preheater body (1), a feed pipe (2), a first cone (3), a guide tube (4), and an inclined plate (5); the feed pipe (2) is fixedly connected to the lower part of the C5 section (15) of the preheater body (1); the first cone (3) is concentrically placed inside the feed pipe (2) and close to the interface between the C5 section (15) and the feed pipe (2); the first cone (3) is fixedly connected to the inner wall of the feed pipe (2) through several evenly distributed inclined plates (5); the lower end of the first cone (3) is fixedly connected to a guide tube (4) that is concentrically arranged with the feed pipe (2).

2. The cement cyclone preheater for anti-sticking pipes according to claim 1, characterized in that: A second cone (6) concentric with the feed pipe (2) is fixedly connected to the upper end of the first cone (3) at the weld between the feed pipe (2) and the C5 section (15).

3. The cement cyclone preheater for anti-sticking pipes according to claim 2, characterized in that: The cross-section of the first cone (3) is at an angle of 40° to 60° to the horizontal plane.

4. The cement cyclone preheater for anti-sticking pipes according to claim 3, characterized in that: The cross-section of the first cone (3) is at 50° to the horizontal plane.

5. The cement cyclone preheater for anti-sticking pipes according to claim 3, characterized in that: The angle between the cross-section of the second cone (6) and the horizontal plane is the same as that of the first cone (3).

6. The cement cyclone preheater for anti-sticking pipes according to claim 1, characterized in that: The inclined plate (5) is evenly arranged in three pieces, and the plate surface is arranged in a direction perpendicular to the horizontal plane.

7. The cement cyclone preheater for anti-sticking pipes according to any one of claims 1 to 6, characterized in that: The first cone (3), the guide tube (4), the inclined plate (5) and the second cone (6) are made of heat-resistant and wear-resistant cast steel.

Images